From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: Kees Cook <keescook@chromium.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
linux-mm@kvack.org, Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 0/3] Assorted improvements to usercopy
Date: Mon, 4 Oct 2021 23:42:20 +0100 [thread overview]
Message-ID: <20211004224224.4137992-1-willy@infradead.org> (raw)
We must prohibit page boundary crossing for kmap() addresses.
vmap() addresses are limited by the length of the mapping, and
compound pages are limited by the size of the page.
These should probably all have test cases?
Matthew Wilcox (Oracle) (3):
mm/usercopy: Check kmap addresses properly
mm/usercopy: Detect vmalloc overruns
mm/usercopy: Detect compound page overruns
arch/x86/include/asm/highmem.h | 1 +
include/linux/highmem-internal.h | 10 ++++++++++
mm/usercopy.c | 33 +++++++++++++++++++++-----------
3 files changed, 33 insertions(+), 11 deletions(-)
--
2.32.0
next reply other threads:[~2021-10-04 22:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-04 22:42 Matthew Wilcox (Oracle) [this message]
2021-10-04 22:42 ` [PATCH 1/3] mm/usercopy: Check kmap addresses properly Matthew Wilcox (Oracle)
2021-10-05 21:23 ` Kees Cook
2021-10-05 21:43 ` Matthew Wilcox
2021-10-05 21:54 ` Kees Cook
2021-10-04 22:42 ` [PATCH 2/3] mm/usercopy: Detect vmalloc overruns Matthew Wilcox (Oracle)
2021-10-05 21:25 ` Kees Cook
2021-10-06 1:26 ` Matthew Wilcox
2021-10-06 3:02 ` Kees Cook
2021-10-04 22:42 ` [PATCH 3/3] mm/usercopy: Detect compound page overruns Matthew Wilcox (Oracle)
2021-10-05 21:26 ` Kees Cook
2021-10-05 22:12 ` Matthew Wilcox
2021-10-05 22:55 ` Kees Cook
2021-10-05 21:27 ` [PATCH 0/3] Assorted improvements to usercopy Kees Cook
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